Closure system for a container and dispensing closure

ABSTRACT

The present invention relates to a closure system, which comprises a dispensing closure and a spout of a container or a spout for a container, to which the dispensing closure can be attached, wherein the dispensing closure is designed as a rebounding closure. The dispensing closure and spout are designed in such a way that the dispensing closure can be separated from the spout or container via a rotational motion. The invention also relates to a dispensing closure for such a closure system.

The present invention relates to a closure system for a container, inparticular for bottles, wherein the closure system comprises adispensing closure and a spout of a container or a spout for a containerto which the dispensing closure can be attached. The dispensing closureis designed as a so-called rebounding closure or snap-on closure(Prellverschluss), so that it essentially can be placed or forciblypressed upon a spout of a container with a dispensing opening inessentially a straight line or in an axial direction, wherein twointeracting elements, one on the spout and the other on the dispensingclosure, are shifted by or over one another due to their flexibilityafforded by the material itself or the geometry of the elements, so thatthe dispensing closure can only be taken off, removed or detached withdifficulty, meaning only by exerting a certain force, also in the axialdirection.

Such closure systems and in particular dispensing closures are known ina variety of forms, and usually made out of a plastic material; however,they can also be made out of other materials, e.g., metals. Reboundingclosure devices are also known in a variety of forms. The advantage tosuch rebounding closures is that they can be mounted relatively easilyby pressing a dispensing closure onto a spout with a dispensing openingin essentially an axial direction.

After the container with closure system has been used, the dispensingclosure typically remains on the dispensing opening, so that thedispensing closure remains on the container during recycling, even ifthe latter is made out of varying materials.

The object of the present invention is to provide an improved closuresystem, which offers advantages in particular with regard to a possibleensuing recycling process.

This object is achieved by a closure system according to claim 1, and bya dispensing closure according to claim 10. Claims 2 to 9 relate toespecially advantageous embodiments of the closure system according tothe invention pursuant to claim 1, while claims 11 to 14 relate toespecially advantageous embodiments of the dispensing closure accordingto the invention pursuant to claim 10.

According to the invention, the spout of a container with a dispensingopening is designed in such a way that a dispensing closure can beattached to the latter. Let it be pointed out at this juncture that theclosure system according to the invention in many instances comprises acomplete container, or the container is provided as a single piece withthe spout and the dispensing opening. However, it is also possible forthe closure system not to comprise a complete container, but only thespout with a dispensing opening, potentially accompanied by a shoulderarea, possibly with an intermediate or partial product, such as a hose,which is only welded in a subsequent procedure, thereby forming a closedcontainer, for example in the form of a tube. It is also possible toprepare a spout element with a dispensing opening that is only laterjoined or attached to a container, for example via welding or any otherpossible attachment methods.

According to the invention, the spout comprises an essentiallycylindrical dispensing element with a dispensing opening, wherein theoutside of the dispensing element is provided with at least one threadedsegment. A shoulder area is preferably provided around the dispensingelement.

The dispensing of the closure system according to the inventioncomprises an essentially cylindrical snap-on pipe, which is designed insuch a way that it can comprise the dispensing element of the spout ifthe dispensing closure is attached to the dispensing opening, whereinthe inside of the dispensing closure exhibits at least one threadedsegment.

According to the invention, the outside of the dispensing element,preferably a shoulder area, is provided with a so-called forcing device,which is designed so as to interact with the snap-on pipe of thedispensing closure in such a way that the dispensing closure is forcedto move in an axial direction when the dispensing closure attached tothe spout is turned, thereby pressing the at least one threaded segmentof the snap-on pipe over the at least one threaded segment of thedispensing element, detaching the dispensing closure from the spout.

The advantage to such a closure system is that, in order to detach adispensing closure in the form of a rebounding closure, meaning toseparate the dispensing closure from the spout or the container with thespout, by means of a rotational motion that is significantly easier toperform than an axial removal motion, a force can also be exerted in anaxial direction on the dispensing closure relative to the spout andcontainer, that the rebounding closure is released, i.e., the twointeracting elements that hold the dispensing closure on the spout ordispensing element or entire container are also guided over each otherin an axial direction against the direction of force, thereby releasingthe rebounding closure.

In conventional rebounding closures, a force must be exerted on thedispensing closure exclusively in an axial direction to release thedispensing closure, which is appreciably more difficult for a user, inparticular in closure devices whose outer shape is very much tailored tothe outer shape of the container itself, so that there is virtually noway of exerting this relative, axial force between the two elements,dispensing closure on the one hand and container or spout on the other,or finding an approach for exerting the axial force.

In addition, the rotational motion is the motion the user is familiarwith from conventional screwed connections, and will hence automaticallyuse, automatically resulting in a release of the rebounding closure,wherein the user only has to exert a limited force solely in therotational direction, automatically generating a conversion of force inthe axial direction.

Therefore, the closure system combines the advantages of twofundamentally different closure system, specifically a reboundingclosure on the one hand, and a rotary closure on the other, inparticular in such a way that, when placing the dispensing closure onthe container, for example after filling or while manufacturing thedispensing closure or container, the closure can be snapped on, in amanner very easy to demonstrate mechanically, while the dispensingclosure can generally be removed more easily by the user from thecontainer or spout prior to recycling or after use of the containeressentially by means of a rotational motion, which is more easilyexecuted during manual operation. The two advantages have previouslyalways been viewed as incompatible, so that the user or manufacturer hadto decide on one of the closure types.

A dispensing element preferably comprises two threaded segments, while adispensing closure of a system according to the invention just aspreferably comprises at least two threaded segments. These threadedsegments are preferably arranged one opposite the other in thecircumferential direction. The advantage to this is that it ensures aclear and reliably sustained positioning of the individual elementsrelative to each other over the entire circumference on the one hand,while simultaneously ensuring a uniform retaining or releasing force.The plurality of segments also ensures a more precisely definedpositioning of the individual elements relative to each other.

The dispensing element preferably also comprises at least two forcingelements, which are preferably ramp-like in design. These forcingelements are also situated in essentially opposing positions in thecircumferential direction in the preferred embodiment. The forcingelements can exhibit different shapes, for example, be essentiallytriangular viewed in a radial direction, while they exhibit a thicknessor expansion in the radial direction that is greater than thecorresponding radial expansion of the snap-on pipe. The correspondinglyadjusted radial expansion of the forcing elements on the one hand andthe snap-on pipe on the other ensures that the snap-on pipe and forcingelement or forcing elements can interact in the manner described above,preventing the snap-on pipe, for example, from lying in a differentposition in its radial direction, thereby possibly not allowing it tointeract with the forcing element(s).

The forcing element preferably has a ramp-like design at least on oneside, wherein varying gradients can be provided, again viewed from aradial direction.

A gradient of the forcing element viewed in a radial direction fromoutside is preferably smaller on the left side than on the right side.The advantage to this is that, when the dispensing closure is turnedrelative to the container or spout in a counterclockwise direction, theusual rotational direction for opening a rotary closure, the snap-onpipe or a recess of a snap-on pipe can be guided along this gradient,wherein this gradient then determines the ratio between rotational angleto axial movement.

If a very high gradient is provided on the right side, meaning for acase where the dispensing closure is turned in the clockwise direction,the typical rotational direction for closing a rotary closure, which ispreferably the case, for example, up to a perpendicular, or axiallyprogressing gradient, movement in a clockwise direction is prevented orat least greatly impeded, while a counterclockwise movement forreleasing the dispensing closure is assisted.

A gradient of the forcing element is preferably selected on the leftside (again viewed radially from outside) that ranges between 20° and60°, preferably between 30° and 50°, and in a particularly preferredembodiment from approx. 40° to 45°. By contrast, a gradient ispreferably selected on the right side that is clearly higher, preferably60° to 90°, preferably 75° to 89°. While a perpendicular gradient isalso possible, a gradient is selected that at least partially lies below90° to help “thread” while placing on the dispensing closure. Naturally,this can be provided in exactly the opposite or mirror-inverted manneras well.

It should also be pointed out that the gradient on each side of theforcing element van vary, meaning it absolutely odes not have to beconstant. In the case of changing gradients even on one side of theforcing element, the aforementioned statements apply for preferredembodiments relative to at least one partial area or one point on therespective side of the forcing element.

The cylindrical snap-on pipe preferably comprises at least one recess,which is designed in such a way that it can at least partiallyaccommodate or envelop at least one forcing device, in particular givena radially outward view of the closure system. The recess is preferablysimilar or complementary in design to the forcing element, so thatreference can be made to the above statements with regard to thegradients.

The at least one recess of the cylindrical snap-on pipe, again viewedfrom outside in a radial direction, is essentially triangular, possiblywith rounded edges or a rounded upper edge, wherein one side of therecess, at least a partial area, is inclined more steeply than the otherside of the recess, wherein reference is here also made to the abovestatements.

In another preferred embodiment, the at least one threaded segment ofthe dispensing element has a gradient of approx. 2° to approx. 20°,preferably from roughly 5° to approx. 15°, wherein the gradient measuresroughly 10° in an especially preferred embodiment. A preferredembodiment further provides an additional partial area on the at leastone threaded segment that exhibits a gradient of roughly 0°, meaningruns essentially horizontal. The advantage to this configuration inparticular is that, in cases where there is a certain clearance betweenthe dispensing closure on the one hand and spout or dispensing openingon the other for essentially manufacturing-related reasons, whichenables an easy relative rotation of the two elements relative to eachother, the latter does not automatically result in a suspension of thedispensing closure, meaning an axial relative motion between thedispensing closure and container or dispensing element.

The invention further relates to a dispensing closure for a closuresystem of the kind described above.

A dispensing closure according to the invention for a closure system isdesigned as a so-called rebounding closure, and comprises an essentiallycylindrical snap-on pipe, the inside of which is provided with at leastone threaded segment.

The essentially cylindrical jacket of the snap-on pipe exhibits at leastone recess, wherein this recess is provided on the inner side or theside of the jacket of the snap-on pipe facing the container. The closureedge of the lower area of the snap-on pipe or the area facing thecontainer preferably runs essentially horizontal, wherein the termhorizontal is understood as a directly perpendicular to an axialdirection of the dispensing closure or perpendicular to a dispensingopening of an accompanying container (if the dispensing closure isplaced on a container). In conventional containers or bottles, the termshorizontal and vertical hence correspond to the actual horizontal andvertical conditions existing when a dispensing closure is placed on acontainer, and the latter is standing on a solid base, with thedispensing opening facing up, for example. However, the dispensingclosure according to the invention and closure system according to theinvention are of course applicable to any other containers, for exampleon tubes with a dispensing closure that can be placed on the dispensingclosure itself, with the dispensing opening facing down.

According to the invention, the at least one recess of the dispensingclosure is designed in such a way that, proceeding from the lower edgeof the jacket of the snap-on pipe, the recess progress in such a waythat a gradient to the horizontal smaller than 90° is present on the oneside, and is less than the gradient on the opposing side, at least in apoint or an area of the respective gradient.

Let it be understood in this conjunction that the sides of the recessesexhibit two opposing gradient areas, which are separated from each othereither by a vertex or a vertex area that runs essentially horizontalover a certain area, or meet or converge at this vertex/vertex area.

While the two gradient areas can preferably run along a straight line atleast over a partial area, it is also possible for the gradient tochange once, several times, or even continuously at specific points ofthe gradient area. The at least one recess is preferably designed insuch a way that the gradient on the one side up to the vertex or vertexarea is always (or at least over a large area) smaller than or equal tothe gradient of the opposing area, wherein the two opposing gradientsare always compared at points that oppose each other in a horizontaldirection, i.e., lie on points along a line running parallel to theplane that is always clamped by the lower edge of a cylindrical snap-onpipe (not taking into account the recess itself), or parallel to a planeperpendicular to the dispensing opening or dispensing direction.

The recess is preferably configured in such a way that two areas can bedistinguished in a vertical direction, wherein the opposing flanks orrecess areas exhibit an identical gradient in an upper area, meaning inan area starting at the vertex or vertex area, so that the recess inthis area is preferably mirror-symmetrical in design relative to avertical axis, which runs through the vertex or middle of the vertexarea, while the recess, in an area located below in a verticaldirection, meaning facing away from the vertex or vertex area of therecess and lying close to the lower jacket of the cylindrical snap-onpipe, exhibits a lower gradient on one side of the recess than the otherrecess, preferably a distinctly lower gradient. The gradient of this onearea is preferably 50% lower than the gradient of the opposing area,with the gradient being half or even less the size.

Let it be noted at this juncture that the term gradient refers solely tothe absolute values, the amount, meaning the progression of the loweredge of the snap-on pipe in the area of the recess relative to thehorizontal, meaning relative to the plane defined by the lowerterminating edge of the snap-on pipe, in an area that has no recess,regardless of the direction, meaning regardless of whether the height ofthe recess increases clockwise or counterclockwise.

The side of the recess where the gradient is greater at least at onepoint than on the opposing area preferably exhibits a gradient rangingfrom 60° to 90°, especially preferred from 75° to 90°, wherein areasvery close to the vertical, but not quite vertical, are selected,especially between 80° and 89°, in particular ranging from 84° to 88°.

This very strong gradient near the vertical ensures in particular thatthe dispensing closure is not inadvertently turned in an undesireddirection, in particular against the releasing direction.

In an especially preferred embodiment, the dispensing closure comprisesat least two recesses of the kind described above, wherein theserecesses are preferably arranged opposite each other in essentially thecircumferential direction of the snap-on pipe. This ensures anespecially reliable positioning of the dispensing closure on acorresponding spout or on a corresponding dispensing opening of acontainer, and hence a container itself.

While it is also possible to provide more than 2 recesses, for example 3or 4 recesses, a smaller number of recesses increases the stability ofthe essentially cylindrical snap-on pipe, of course depending on therespective material selected, in particular with regard to anessentially radial expansion, so that a lower number of recesses ispreferred.

Therefore, 2 recesses are preferred, since they combine the twoaforementioned aspects in a particularly effective manner.

At least one recess is preferably designed in such a way in the verticalor axial direction that it extends over at least 50%, preferably overmore than 60%, 70% or even more than 80% or 90% of the verticalextension of the jacket of the cylindrical snap-on pipe. While severalembodiments can even provide that the recess extend over the entire areaof the jacket of the snap-on pipe, at least a small web area orconnecting area must also always preferably be provided between theparts of the jacket that are “separated” from each other by the at leastone recess in the jacket area.

In a preferred embodiment, the dispensing closure further comprises asealing cone designed within the snap-on pipe, preferablyconcentrically, with which a dispensing opening in a spout of acontainer can be sealed.

Use is preferably made of dispensing closures that comprise a closurebody and hinged cover, which is hinged to the closure body. Of course,use can be made of other dispensing closures too, such as so-called“disk-top-closures.

These and other advantages and features of the invention can be gleanedfrom the attached drawings, which depict especially advantageousembodiments. Shown on:

FIG. 1 is a partially cut side view of an embodiment of a dispensingclosure for a closure system according to the invention;

FIG. 2 is a partially cut front view of the dispensing closure shown onFIG. 1;

FIG. 3 is a side view of a spout based on an embodiment of a closuresystem according to the invention;

FIG. 4 is the spout shown on FIG. 3 in another side view, specificallyin a view turned by 90° by comparison to FIG. 3;

FIG. 5 is a partially cut side view of a closure system according to anembodiment with a dispensing closure of the kind depicted on FIGS. 1 and2, and with a spout as depicted on. FIGS. 3 and 4;

FIG. 6 is the embodiment shown on FIG. 5 in a partially cut view, butcut in other planes than depicted on FIG. 5;

FIG. 7 is a partially cut view of the embodiment depicted on FIG. 1 to6, wherein the dispensing closure is turned relative to the spout by aspecific angle;

FIG. 8 is another embodiment of a dispensing closure according to theinvention in a view depicted on FIG. 1 relative to the first embodiment;and

FIG. 9 is another embodiment of a spout according to the invention of aclosure system based on the invention in the view depicted on FIG. 3relative to the first embodiment.

FIG. 1 shows a partially cut side view of a dispensing closure 100,which comprises a closure body 200 and a cover 400, which is pivoted tothe closure body 200 with a hinge 300. The closure body 200, which canbe attached to a spout of a container with a dispensing opening (see inparticular FIG. 5 and FIG. 6, along with the following description),comprises a snap-on pipe 220 with an essentially cylindrical jacket, thelower end of which ends in an essentially horizontally runningterminating edge 224.

The inside of the snap-on pipe 220 is provided with 2 threaded segments222, which can interact with accompanying threaded segments (622, seeFIGS. 3 and 4) of a spout of a container,

The snap-on pipe 220 exhibits two recesses 240 (only one visible on FIG.1), which are arranged opposite each other in the circumferentialdirection of the snap-on pipe 220. The special shape of the recesses 240will be described below in particular with regard to FIG. 6.

The closure body 200 further comprises a sealing cone 280, which, whilebeing attached to a container or a spout, extends into a dispensingopening and seals it, see in particular FIG. 5.

FIG. 2 shows a front view of the embodiment depicted on FIG. 1, Clearlyvisible here in particular is one of the threaded segments 222, whichexhibits a gradient of approx. 10°. Let it also be noted at thisjuncture that the two recesses 240 on FIG. 2 are essentially located onthe right or left side, even though difficult to see in light of thepartially cut view, but provided with reference numbers.

FIG. 3 shows a side view of a spout of a closure system according to theinvention, onto which a dispensing closure of the kind depicted on FIGS.1 and 2 can be placed.

The spout 600 of a container (not shown) comprises a dispensing opening620, which is enveloped or formed by an essentially cylindrical neckarea 610, the outside of which is provided with threaded segments 622,which interact with the accompanying threaded segments 222 of thedispensing closure 200 when the dispensing closure 100 (see FIG. 1) isattached to the spout 600.

The spout 600 of the closure system according to this embodimentcomprises 2 forcing devices 640, arranged in opposing positions in thecircumferential direction of the neck area 610 and on a shoulder area680 of the spout 600. Each of the forcing devices 640 comprises a firstside 650 and a second side 660, which are separated from each other by avertex 642 or a vertex area. The gradient of the first side 650 runsessentially uniformly until shortly before the vertex, and exhibits agradient of roughly 80°. The gradient of the second side also runsessentially along a straight line, but flattens out markedly before thevertex 642. The gradient of the second side 660 relative to theuniformly proceeding area preferably extending over approx. 60% to 90%,in particular 80% to 90% of the length of the second side 660 measuresroughly 45°.

The function of these forcing devices as they interact with the snap-onpipe in the area of the recesses becomes evident in particular inconjunction with FIG. 7, and will be explained below.

FIG. 4 shows the spout as depicted on FIG. 3, but turned by 90°, meaningviewed from the right or left relative to FIG. 3. Clearly visible hereare the two threaded segments 622 on the one side, as well as the firstside 650 of one of the forcing devices 640 along with the second side660 of the other forcing device 640.

Also clearly evident on FIG. 4 is the expansion of the forcing devices440 in a radial direction b, which in this embodiment measures approx. 3millimeters, and typically lies between 2 and 4 millimeters in otherpreferred embodiments, thereby ensuring that the forcing elements 640with the accompanying elements of the snap-on pipe 220 interact, inparticular as shown on FIG. 7.

FIG. 5 shows a partially cut view of both the dispensing closure 100 andthe spout 600, so that reference is made to the description for FIG. 1to 4 as relates to the individual elements.

Clearly evident on FIG. 5 is the interaction between the snap-on pipe220 and its threaded segments 222 on the one hand and the neck area 610with its threaded segments 622 on the other, thereby ensuring a reliableattachment of the dispensing closure on the spout. Since the dispensingclosure involves a so-called rebounding closure, the closure systemdepicted on FIG. 5 is assembled by simply slipping or pressing orsnapping the dispensing closure 100 onto the spout 600 from above inessentially an axial direction, during which the snap-on pipe 220 canexpand in a radial direction, in particular owing to the recesses, sothat the threaded segments 222 of the snap-on pipe 220 are pressed overthe threaded segments 622 of the neck area 610.

FIG. 6 shows the embodiment depicted on FIG. 5, but with a partially cutarea that deviates from FIG. 5. Clearly evident on FIG. 6 is therelative positioning and interaction of one of the recesses 240 of thesnap-on pipe 220 with the accompanying forcing element 640.

Let it be noted at this juncture that the first side 250 of the recess240 on the right side of FIG. 6 interacts with a corresponding gradientof the first side 650 of the forcing element 640 with a very highgradient of roughly 80°, thereby impeding or even preventing a clockwiserotational motion of the dispensing closure, so that the first side 250of the recess 240 moves toward the first side 250 of the forcing element640, while enabling a counterclockwise expansion of the dispensingclosure, since a slighter gradient 264 of the recess 240 interacts withthe slighter gradient on the second side 660 of the forcing element 640,so that turning the dispensing closure counterclockwise presses up thedispensing closure in an axial direction as well, as depicted inparticular on FIG. 7 described below.

While FIG. 7 shows the embodiment depicted on FIG. 6, a counterclockwiserotation of the dispensing closure 100 has already taken place bycomparison to the attachment position presented on FIG. 6 (top view). Asclearly evident, the interaction between the gradient 260, and inparticular the partial area 264 of the gradient 260, the recess 240 andthe accompanying or complementary gradient of the second side 660 of theforcing element 640 causes the dispensing closure to also be pressed upwith a continuous rotational motion. This movement presses the threadedsegments 222 of the snap-on pipe 220 over the threaded segments 622 ofthe neck area 610 of the spout, as enabled by the flexibility of thesnap-on pipe 220, which is also caused by the recess 240 itself.

In this way, it can be ensured that a counterclockwise rotational motionof the dispensing closure, meaning in the usual opening direction, alsoexerts a force in the axial direction, which automatically separates thedispensing closure 100 designed as a rebounding closure from the spoutor the container. Of course, it is also possible to design thedispensing closure and spout in such a way as to achieve a separationduring a clockwise rotation, as described above.

FIGS. 8 and 9 depict another embodiment of a dispensing closureaccording to the invention for a closure system according to theinvention and a spout of a closure system according to the invention.The elements of this embodiment essentially correspond to theembodiments shown on FIG. 1 to 7, so that reference is made to thedescription for FIG. 1 to 7 to avoid repetition. The same or similarelements have been provided with identical reference numbers.

The difference in the embodiments depicted on FIGS. 8 and 9 involves thedesign of the threaded segments 222, 228 of the snap-on pipe 220 on theone hand, and the accompanying threaded segments 622, 628 on the neckarea 610 of the spout. The threaded segments 222 and 622 essentially runas shown in the embodiments depicted on FIG. 1 to 7, but short,horizontally running partial segments 228, 628 follow these threadedsegments 222, 622, which exhibit a gradient.

These additional horizontally running threaded segments 228, 628 resultin a situation where, even given a slight relative rotational motion ofthe dispensing closure 100, no forced vertical relative motion of thedispensing closure is generated in relation to the spout. This ensuresthat no axial movement of the dispensing closure will be caused by evena slight relative rotational motion, which can in part not be avoidedowing to clearance and manufacturing accuracies, which supports theattachment and tightness during the use of the dispensing closure orclosure system, or a container with such a closure system.

The features disclosed in the above description, claims and drawings canbe of importance in implementing the invention in its variousembodiments, whether taken individually or in any combination.

1. A closure system that comprises a dispensing closure (200) and aspout (600) of a container or for a container, on which the dispensingclosure (200) can be attached, wherein the dispensing closure (200) isdesigned as a rebounding closure, wherein the spout (600) comprises anessentially cylindrical dispensing element (610) with a dispensingopening (620), the outside of which is provided with at least onethreaded segment (622), and the dispensing closure (200) comprises anessentially cylindrical snap-on pipe (220), the inner side of which isprovided with at least one threaded segment (222) for interacting withat least one threaded segment (622) of the dispensing opening (620),characterized in that the outside of the dispensing element (610) isprovided with at least one forcing device (640), which is designed tointeract with the snap-on pipe (220) so as to force the dispensingclosure (200) to move in an axial direction when turning the dispensingclosure (200) attached to the spout (600), so that the at least onethreaded segment (222) of the snap-on pipe (220) is pressed over the atleast one threaded segment (622) of the dispensing element (610),thereby releasing the dispensing closure (200) from the spout (600). 2.The closure system according to claim 1, characterized in that thedispensing element (610) comprises at least two threaded segments (622).3. The closure system according to claim 1, characterized in that thesnap-on pipe (220) of the dispensing closure (200) comprises at leasttwo threaded segments (222).
 4. The closure system according claim 1,characterized in that the dispensing element (610) comprises at leasttwo forcing elements (640).
 5. The closure system according to claim 1,characterized in that at least one forcing element (640) is ramp-shapedin design.
 6. The closure system according to claim 1, characterized inthat a dimension of the at least one forcing element (640) is greater ina radial direction than the radial dimension of the at least onethreaded segment (622) of the dispensing element (610) and/or greaterthan the radial thickness of the snap-on pipe (220).
 7. The closuresystem according to claim 1, characterized in that the snap-on pipe(220) comprises at least one recess (240) designed in such a way as toat least partially accommodate a forcing element (640) in a state inwhich the dispensing closure (200) is attached to the spout (600). 8.The closure system according to claim 1, characterized in that agradient of the at least one threaded segment (622) of the dispensingelement (610) and/or the at least one threaded segment (622) of thesnap-on pipe (220) ranges from 2° to 20°, preferably from 5° to 15°. 9.The closure system according to claim 1, characterized in that the atleast one threaded segment (622) of the dispensing element (610) and/orthe at least one threaded segment (622) of the snap-on pipe (220)additionally exhibits a partial area having a gradient of 0°.
 10. Adispensing closure (100) for a closure system according to claim 1,wherein the dispensing closure (100) is designed as a reboundingclosure, and comprise an essentially cylindrical snap-on pipe (220), theinside of which is provided with at least one threaded segment (222),wherein the snap-on pipe (220) exhibits at least one recess (240), whichcomprises a first side (250) and a second side (260), which converge ata vertex (242) or vertex area, wherein the gradients of the first andsecond side of the recess (240) are designed in such a way that agradient on one side (260) is smaller at least at one point than thegradient on the opposite side (250) at a point lying at the same axialheight.
 11. The dispensing closure according to claim 10, characterizedin that at least two recesses (640) are provided.
 12. The dispensingclosure according to claim 10, characterized in that the recess (640)extends in an axial direction over at least 50% of the height of thesnap-on pipe (220).
 13. The dispensing closure according to claim 10,characterized in that the dispensing closure also comprises a sealingcone (280) inside the snap-on pipe (220).
 14. The dispensing closureaccording to claim 10, characterized in that the dispensing closureinvolves a hinged cover seal, which comprises a hinged cover (400)attached to a closure body (200) by a hinge (300).